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https://issues.apache.org/jira/browse/HADOOP-6541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016611#comment-13016611
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Todd Lipcon commented on HADOOP-6541:
-------------------------------------
Here are some comments from the user perspective (didn't look at code yet)
- should have some kind of help command - either "help", or "?"
- I think "hadoop fs -shell" makes more sense than "hadoop shell", since this
is specifically for interacting with filesystems
- The following command threw a RuntimeException and exited:
{code}
hadoop> cd hdfs://monster01.sf.cloudera.com:8020
org.apache.hadoop.HadoopIllegalArgumentException: Unsupported name: has scheme
but relative path-part
at
org.apache.hadoop.fs.FileContext.checkNotSchemeWithRelative(FileContext.java:264)
at
org.apache.hadoop.fs.FileContext.setWorkingDirectory(FileContext.java:458)
at org.apache.hadoop.shell.CmdShell.cd(CmdShell.java:446)
at org.apache.hadoop.shell.CmdShell.interpretCmd(CmdShell.java:693)
{code}
- IOExceptions shouldn't include their full backtrace unless we're in debug
mode. EG "rmr asdfasdf" currently shows the full stack trace instead of just
the simple error message.
- "cd" without a path goes to the home directory, which seems right. But, if
the home directory doesn't exist, it seems to go to "/" which is unexpected
behavior. I would expect a FileNotFoundException
- "chmod", "chown" and "chgrp", "count", and "du" don't seem to be found
- every command I type, it seems to echo the command back to me
Future enhancements to do as some other JIRA:
- "lcd", "lpwd" would be useful.
- a "head" command would be very useful
- "cd -" like in bash would be cool
- showing the cwd in the prompt would be handy
- tab completion would be handy
> An Interactive Hadoop FS shell
> ------------------------------
>
> Key: HADOOP-6541
> URL: https://issues.apache.org/jira/browse/HADOOP-6541
> Project: Hadoop Common
> Issue Type: New Feature
> Reporter: Aaron Kimball
> Assignee: Aaron Kimball
> Attachments: HADOOP-6541.2.patch, HADOOP-6541.3.patch,
> HADOOP-6541.4.patch, HADOOP-6541.5.patch, HADOOP-6541.6.patch,
> HADOOP-6541.patch
>
>
> A shell that allows the user to execute multiple filesystem operations in a
> single JVM instance at a prompt.
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